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Particle packing of BaTiO3 powders in aqueous solutions

1987; Elsevier BV; Volume: 96; Linguagem: Inglês

10.1016/0025-5416(87)90564-7

1873-4928

Ito H, Mark V. Parish, H. Kent Bowen,

Ferroelectric and Piezoelectric Materials

Barium titanate (BaTiO3) powder was dispersed in aqueous solutions containing different additives. The particle-packing behavior was investigated and compared with results from organic solvent systems. Two polyelectrolytes were found to be the best dispersants of the additives tested in pure water. A solution of 1.0 wt.% Darvan® C in deionized water gave a sediment density that was about 50% of the measured powder density, which is comparable with the best densities obtained in the organic systems. The density of the Darvan® C compact after sintering at 1250 °C for 1 h was about 99% of the theoretical density. The grain growth during sintering was affected by the solution used in the compaction process.